CVE-2026-43979
Description
Local Deep Research is an AI-powered research assistant for deep, iterative research. Prior to 1.6.0, PDFService._markdown_to_html() constructs an HTML document by interpolating user-controlled values — specifically title (sourced from research.title or research.query) and metadata key-value pairs — directly into an f-string without any HTML escaping. An authenticated attacker can craft a research query containing HTML special characters to inject arbitrary HTML tags into the document processed by WeasyPrint during PDF export. This injection can be chained to trigger a Server-Side Request Forgery (SSRF), bypassing the application's existing SSRF defenses in ssrf_validator.py. This vulnerability is fixed in 1.6.0.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
local-deep-researchPyPI | < 1.6.0 | 1.6.0 |
Affected products
2- Range: < 1.6.0
Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-fj2m-qvh9-jq4qghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-43979ghsaADVISORY
- github.com/LearningCircuit/local-deep-research/commit/0148fa265a3da460c07def7441f9ac49ea61fbcbghsaWEB
- github.com/LearningCircuit/local-deep-research/commit/15f13d5c79847f1c38c2dc67bd0027c38af9e34bghsaWEB
- github.com/LearningCircuit/local-deep-research/pull/3082nvdWEB
- github.com/LearningCircuit/local-deep-research/pull/3613nvdWEB
- github.com/LearningCircuit/local-deep-research/security/advisories/GHSA-fj2m-qvh9-jq4qnvdWEB
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